Predicting the dark matter velocity distribution : test against hydrodynamical simulations (via Zoom: https://mppmu.zoom.us/j/99300254726)

by Dr Martin Stref (LAPTH)

Thursday 28 Jan 2021, 11:00 → 12:00 Europe/Berlin

Zoom

The knowledge of the dark matter (DM) velocity distribution is an important element of several types of DM searches e.g. direct detection, p-wave-suppressed or Sommerfeld-enhanced annihilating DM. Many predictions for these signals rely on a Maxwell-Boltzmann approximation for the velocity distribution, however a more refine calculation can be obtained using the Eddington inversion method. I will review the theoretical foundations of this technique as well as some of its shortcomings, then present a recent test of its reliability against hydrodynamical cosmological simulations.